中级微观经济学（双语）章节测试课后答案2024春

第三章测试

1.If preferences are quasilinear, then for very high incomes the income offer curve is a straight line parallel to one of the axes.
A:错 B:对
答案:B
2.If two goods are substitutes, then an increase in the price of one of them will increase the demand for the other.
A:对 B:错 3.An Engel curve is a demand curve with the vertical and horizontal axes reversed.
A:错 B:对 4.Daisy received a tape recorder as a birthday gift and is not able to return it. Her utility function is U(x,y,z)=x+z1/2f(y)where z is the number of tapes she buys, y is the number of tape recorders she has and x is the amount of money she has left to spend. f(y)=0if y<1and f(y)=8 if y is 1 or greater. The price of tapes is 2 and she can easily afford to buy dozens of tapes. How many tapes will she buy? 
A:4 B:2 C:8 D:6 5.Mike consumes two commodities, x and y; and his utility function is min{x +2y,y+2x}. He chooses to buy 8 units of good x and 16 units of good y. The price of good y is 0.50. What is his income? 
A:32 B:24 C:16 D:40 6.Quasilinear preferences are homothetic when the optimal amount of one of the goods is not affordable.
A:错 B:对 7.Walt consumes strawberries and cream but only in the fixed ratio of three boxes of strawber ries to two cartons of cream. At any other ratio, the excess goods are totally useless to him. The cost of a box of strawberries is 10 and the cost of a carton of cream is 10. Walt's income is 200.Which of the following is true?
A:Walt demands 12 boxes of strawberries. B:Walt considers strawberries and cartons of cream to be perfect substitutes. C:Walt demands 10 boxes of strawberries. D:Walt demands 10 cartons of cream. 8.Madonna buys only two goods. Her utility function is Cobb-Douglas. Her demand functions have which of the following properties?
A:Her demand for each of the goods depends on income and on the prices of both goods. B:Her demand for neither good depends on income. C:Her demand for one of the two goods does not depend on income. D:Her demand for each of the two goods depends only on her income and on the price of that good itself. 9.The downward sloping demand curve can be explained by：
A:The income effect B:none of all C:Diminishing marginal returns D:Diminishing marginal utility 10.Other things held constant, which of the following would not cause a change in demand for beef?
A:A decrease in the price of beef B:A decrease in consumers' incomes during a recession C:An increase in the price of chicken which is a substitute for beef D:An expectation that next month prices will be lower